KR101689602B1 - Mobile terminal and method for controlling driving voltage of power amplifier - Google Patents

Abstract

The present invention relates to a mobile terminal, and more particularly, to a mobile terminal capable of adjusting a consumed current of a power amplification module according to a reception strength, reducing heat generation during a call, and increasing a duration of a battery.

Description

[0001] The present invention relates to a mobile terminal and a method of controlling a driving voltage of a power amplification module,

The present invention relates to a driving voltage control method for a mobile terminal and a power amplification module capable of minimizing consumption current of a power amplification module according to reception strength.

The terminal can move And can be divided into a mobile / portable terminal and a stationary terminal depending on whether the mobile terminal is a mobile terminal or a mobile terminal. The mobile terminal can be divided into a handheld terminal and a vehicle mount terminal according to whether the user can directly carry the mobile terminal.

Such a terminal has various functions, for example, in the form of a multimedia device having multiple functions such as photographing and photographing of a moving picture, reproduction of a music or video file, reception of a game and broadcasting, etc. .

In order to support and enhance the functionality of such terminals, it may be considered to improve the structural and / or software parts of the terminal.

The mobile terminal includes a power amplifier (PA) that amplifies the power intensity of the RF signal to wirelessly transmit the RF signal output from the RF transmitter through the antenna.

On the other hand, conventionally, the amount of current supplied to the power amplification module is set to be the same regardless of the intensity of signals received during a call.

According to this method, although a preset battery current is supplied for smooth call continuity at a weak reception intensity, the same battery current is supplied even at a strong reception intensity, thereby consuming battery current.

In addition, due to the occurrence of excessive consumption current, heat is generated in the mobile terminal, and the use time of the communication is reduced.

A driving voltage control method for a mobile terminal and a power amplification module capable of minimizing consumption current of a power amplification module according to reception intensity.

Another object of the present invention is to provide a driving voltage control method for a mobile terminal and a power amplification module capable of supplying an optimal driving voltage satisfying an adjacent channel leakage equipment with a power amplification module.

It is another object of the present invention to provide a driving voltage control method for a mobile terminal and a power amplification module capable of reducing heat generation during a call and increasing the duration of a battery.

A mobile terminal according to an embodiment of the present invention for realizing the above-mentioned problems includes a power amplification module having a plurality of operation modes and amplifying power intensity of an RF signal; A modem for transmitting an RF signal to the power amplification module and controlling an operation mode of the power amplification module; A power detector for detecting a power intensity of an RF signal output from the power amplifier module and outputting a reference voltage; And a DCDC converter for adjusting the power detection value according to a gain corresponding to an operation mode of the power amplification module to supply a driving voltage to the power amplification module.

Here, the operation mode of the power amplification module includes a high power mode, a middle power mode, and a low power mode, and the gain may include a high gain, a middle gain, and a low gain corresponding to each power mode.

In addition, the gain can be increased from the high gain to the low gain.

The DCDC converter may further include: a memory unit storing a plurality of gains; A switching unit for selecting a gain according to an operation mode of the power amplifier module; And a drive voltage adjustment unit for adjusting the power detection value to the selected gain.

Also, the DCDC converter may further include a gain adjustment unit for adjusting the magnitude of each gain.

The power detection unit may include a reference voltage corresponding to the output of the power amplification module.

Also, the reference voltage may be proportional to the output of the power amplification module.

Also, the driving voltage may be a minimum voltage satisfying an adjacent channel leakage facility.

In addition, the modem may include a driving signal generator for on / off control of the power amplifier module and the DCDC converter.

The mobile terminal according to an embodiment of the present invention may further include a filter provided between the modem and the power amplification module.

According to an embodiment of the present invention, there is provided a method of controlling a driving voltage of a power amplifying module, the method comprising: detecting a power intensity of an RF signal output from a power amplifying module and outputting a reference voltage; Determining an operation mode of the power amplification module; Adjusting the reference voltage with a gain according to the operation mode to output a driving voltage; And transmitting the driving voltage to the power amplifier module.

Here, the operation mode of the power amplification module includes a high power mode, a middle power mode, and a low power mode, and the gain may include a high gain, a middle gain, and a low gain corresponding to each power mode.

In addition, the gain can be increased from the high gain to the low gain.

The step of outputting the driving voltage may include: selecting a gain according to the operation mode; And adjusting the reference voltage to a selected gain.

Also, the reference voltage may be proportional to the output of the power amplification module.

Also, the driving voltage may be a minimum voltage to satisfy the adjacent channel leakage equipment.

According to the driving voltage control method of the mobile terminal and the power amplification module according to at least one embodiment of the present invention configured as described above, the consumption current of the power amplification module can be minimized according to the reception intensity.

In addition, according to the driving voltage control method of the mobile terminal and the power amplification module according to at least one embodiment of the present invention, the power amplification module can supply the optimal driving voltage satisfying the adjacent channel leakage equipment.

Further, according to the driving voltage control method of the mobile terminal and the power amplification module according to at least one embodiment of the present invention, it is possible to reduce the heat generation during the call and increase the duration of the battery.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.
2 is a front perspective view of a mobile terminal according to an embodiment of the present invention;
3 is a rear perspective view of a mobile terminal according to an embodiment of the present invention;
4 is a block diagram of a mobile terminal according to an embodiment of the present invention;
5 is a graph for explaining a relationship between an output of a power amplifying module constituting a mobile terminal and a driving voltage according to an embodiment of the present invention.
FIG. 6 is a graph for explaining a relationship between an output and a consumption current of a power amplifying module constituting a mobile terminal according to an embodiment of the present invention; FIG.

Hereinafter, a mobile terminal related to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

The mobile terminal described in this specification may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), navigation and the like. However, it will be understood by those skilled in the art that the configuration according to the embodiments described herein may be applied to a fixed terminal such as a digital TV, a desktop computer, and the like, unless the configuration is applicable only to a mobile terminal.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.

The mobile terminal 100 includes a wireless communication unit 110, an audio / video input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, A controller 170, a controller 180, a power supply 190, and the like. The components shown in FIG. 1 are not essential, and a mobile terminal having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The wireless communication unit 110 may include one or more modules for enabling wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and the network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

The broadcast receiving module 111 receives broadcast signals and / or broadcast-related information from an external broadcast management server through a broadcast channel.

The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may refer to a server for generating and transmitting broadcast signals and / or broadcast related information, or a server for receiving broadcast signals and / or broadcast related information generated by the broadcast management server and transmitting the generated broadcast signals and / or broadcast related information. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. The broadcast-related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 112.

The broadcast-related information may exist in various forms. For example, an EPG (Electronic Program Guide) of DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of Digital Video Broadcast-Handheld (DVB-H).

For example, the broadcast receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S), a Media Forward Link Only (DVF-H) And a Digital Broadcasting System (ISDB-T) (Integrated Services Digital Broadcast-Terrestrial). Of course, the broadcast receiving module 111 may be adapted to other broadcasting systems as well as the digital broadcasting system described above.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 112 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data depending on a voice call signal, a video call signal or a text / multimedia message transmission / reception.

The wireless Internet module 113 is a module for wireless Internet access, and may be built in or externally attached to the mobile terminal 100. WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) and the like can be used as wireless Internet technologies.

The short-range communication module 114 refers to a module for short-range communication. Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used as a short range communication technology.

The position information module 115 is a module for obtaining the position of the mobile terminal, and a representative example thereof is a Global Position System (GPS) module.

Referring to FIG. 1, an A / V (Audio / Video) input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 122. The camera 121 processes an image frame such as a still image or moving image obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 151. [

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ Two or more cameras 121 may be provided depending on the use environment.

The microphone 122 receives an external sound signal through a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 when the voice data is in the call mode, and output. Various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in receiving an external sound signal.

The user input unit 130 generates input data for a user to control the operation of the terminal. The user input unit 130 may include a key pad dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like.

The sensing unit 140 senses the current state of the mobile terminal 100 such as the open / close state of the mobile terminal 100, the position of the mobile terminal 100, the presence or absence of user contact, the orientation of the mobile terminal, And generates a sensing signal for controlling the operation of the mobile terminal 100. For example, when the mobile terminal 100 is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. It is also possible to sense whether the power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like. Meanwhile, the sensing unit 140 may include a proximity sensor 141.

The output unit 150 is for generating output related to the visual, auditory or tactile sense and includes a display unit 151, an audio output module 152, an alarm unit 153, and a haptic module 154 .

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, when the mobile terminal is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the mobile terminal 100 is in the video communication mode or the photographing mode, the photographed and / or received video or UI and GUI are displayed.

The display unit 151 may be a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), a flexible display display, and a 3D display.

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display unit 151 may also be of a light transmission type. With this structure, the user can see an object located behind the terminal body through the area occupied by the display unit 151 of the terminal body.

There may be two or more display units 151 according to the embodiment of the mobile terminal 100. For example, in the mobile terminal 100, a plurality of display portions may be spaced apart from one another or may be disposed integrally with each other, or may be disposed on different surfaces.

(Hereinafter, referred to as a 'touch screen') in which a display unit 151 and a sensor for sensing a touch operation (hereinafter, referred to as 'touch sensor') form a mutual layer structure, It can also be used as an input device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display unit 151 or a capacitance generated in a specific portion of the display unit 151 into an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and transmits the corresponding data to the controller 180. Thus, the control unit 180 can know which area of the display unit 151 is touched or the like.

Referring to FIG. 1, a proximity sensor 141 may be disposed in an inner region of the mobile terminal or in the vicinity of the touch screen, which is surrounded by the touch screen. The proximity sensor refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or a nearby object without mechanical contact using the force of an electromagnetic field or infrared rays. The proximity sensor has a longer life span than the contact sensor and its utilization is also high.

Examples of the proximity sensor include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. And to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer when the touch screen is electrostatic. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

Hereinafter, for convenience of explanation, the act of recognizing that the pointer is positioned on the touch screen while the pointer is not in contact with the touch screen is referred to as "proximity touch & The act of actually touching the pointer on the screen is called "contact touch. &Quot; The position where the pointer is proximately touched on the touch screen means a position where the pointer is vertically corresponding to the touch screen when the pointer is touched.

The proximity sensor detects a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, a proximity touch movement state, and the like). Information corresponding to the detected proximity touch operation and the proximity touch pattern may be output on the touch screen.

The audio output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output module 152 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the mobile terminal 100. [ The audio output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the mobile terminal 100. Examples of events that occur in the mobile terminal include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 153 may output a signal for notifying the occurrence of an event in a form other than the video signal or the audio signal, for example, vibration. The video signal or the audio signal may be output through the display unit 151 or the audio output module 152 so that they may be classified as a part of the alarm unit 153.

The haptic module 154 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 154 is vibration. The intensity and pattern of the vibration generated by the hit module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to the vibration, the haptic module 154 may include a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or a suction force of the air through the injection port or the suction port, a touch on the skin surface, contact with an electrode, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 154 can be implemented not only to transmit the tactile effect through the direct contact but also to allow the user to feel the tactile effect through the muscular sensation of the finger or arm. At least two haptic modules 154 may be provided according to the configuration of the mobile terminal 100.

The memory 160 may store a program for the operation of the controller 180 and temporarily store input / output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory 160 may store data on vibration and sound of various patterns outputted when a touch is input on the touch screen.

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), a RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM A disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data to the external device. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

The identification module is a chip for storing various information for authenticating the use right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM), a general user authentication module A Universal Subscriber Identity Module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port.

When the mobile terminal 100 is connected to an external cradle, the interface unit may be a path through which power from the cradle is supplied to the mobile terminal 100, or various command signals input by the user to the cradle may be transmitted It can be a passage to be transmitted to the terminal. The various command signals or the power source input from the cradle may be operated as a signal for recognizing that the mobile terminal is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the mobile terminal. For example, voice communication, data communication, video communication, and the like. The control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the control unit 180 or may be implemented separately from the control unit 180. [

The controller 180 may perform a pattern recognition process for recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components.

The various embodiments described herein may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to a hardware implementation, the embodiments described herein may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays May be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and other electronic units for performing other functions. In some cases, May be implemented by the control unit 180.

According to a software implementation, embodiments such as procedures or functions may be implemented with separate software modules that perform at least one function or operation. The software code may be implemented by a software application written in a suitable programming language. The software codes are stored in the memory 160 and can be executed by the control unit 180. [

2 is a perspective view of a mobile terminal according to an embodiment of the present invention.

The disclosed mobile terminal 100 has a terminal body in the form of a bar. However, the present invention is not limited thereto, and can be applied to various structures such as a slide type, a folder type, a swing type, and a swivel type in which two or more bodies are relatively movably coupled.

The body includes a case (a casing, a housing, a cover, and the like) which forms an appearance. In this embodiment, the case may be divided into a front case 101 and a rear case 102. [ A variety of electronic components are embedded in the space formed between the front case 101 and the rear case 102. At least one intermediate case may be additionally disposed between the front case 101 and the rear case 102. [

The cases may be formed by injection molding a synthetic resin, or may be formed to have a metal material such as stainless steel (STS) or titanium (Ti) or the like.

The display unit 151, the sound output unit 152, the camera 121, the user input units 130/131 and 132, the microphone 122, the interface 170, and the like may be disposed in the front body 101 have.

The display unit 151 occupies most of the main surface of the front case 101. A sound output unit 151 and a camera 121 are disposed in an area adjacent to one end of both ends of the display unit 151 and a user input unit 131 and a microphone 122 are disposed in an area adjacent to the other end. The user input unit 132 and the interface 170 may be disposed on the side surfaces of the front case 101 and the rear case 102. [

The user input unit 130 is operated to receive a command for controlling the operation of the mobile terminal 100 and may include a plurality of operation units 131 and 132. The operation units 131 and 132 may be collectively referred to as a manipulating portion and may be employed in any manner as long as the user operates in a tactile manner.

The contents inputted by the first or second operation unit 131 or 132 may be variously set. For example, the first operation unit 131 receives commands such as start, end, scroll, and the like, and the second operation unit 132 controls the size of the sound output from the sound output unit 152 or the size of the sound output from the display unit 151 To the touch recognition mode of the touch screen.

3 is a rear perspective view of the mobile terminal shown in FIG.

Referring to FIG. 3, a camera 121 'may be further mounted on the rear surface of the terminal body, that is, the rear case 102. The camera 121 'may have a photographing direction substantially opposite to the camera 121 (see FIG. 2), and may be a camera having different pixels from the camera 121.

For example, the camera 121 may have a low pixel so that the face of the user can be photographed and transmitted to the other party in case of a video call or the like, and the camera 121 ' It is preferable to have a large number of pixels. The cameras 121 and 121 'may be installed in the terminal body so as to be rotatable or pop-upable.

A flash 123 and a mirror 124 are additionally disposed adjacent to the camera 121 '. The flash 123 illuminates the subject when the subject is photographed by the camera 121 '. The mirror 124 allows the user to illuminate the user's own face or the like when the user intends to shoot himself / herself (self-photographing) using the camera 121 '.

An acoustic output 152 'may be additionally disposed on the rear surface of the terminal body. The sound output unit 152 'may implement the stereo function together with the sound output unit 152 (see FIG. 2) and may be used for the implementation of the speakerphone mode in a call.

In addition to the antenna for a call or the like, a broadcast signal reception antenna 124 may be additionally disposed on the side of the terminal body. The antenna 124 constituting a part of the broadcast receiving module 111 (see FIG. 1) may be installed to be able to be drawn out from the terminal body.

A power supply unit 190 for supplying power to the mobile terminal 100 is mounted on the terminal body. The power supply unit 190 may be built in the terminal body or may be detachable from the outside of the terminal body.

The rear case 102 may further include a touch pad 135 for sensing a touch. The touch pad 135 may also be of a light transmission type like the display unit 151. [ In this case, if the display unit 151 is configured to output time information on both sides, the time information can be recognized through the touch pad 135 as well. The information output on both sides may be all controlled by the touch pad 135. [ Alternatively, a display may be additionally mounted on the touch pad 135, and a touch screen may be disposed on the rear case 102 as well.

The touch pad 135 operates in correlation with the display portion 151 of the front case 101. The touch pad 135 may be disposed parallel to the rear of the display unit 151. The touch pad 135 may have a size equal to or smaller than that of the display unit 151.

The mobile terminal 100 related to the present invention has been described in terms of the functional components and the arrangement of the respective components.

Hereinafter, a driving voltage control method of a mobile terminal and a power amplification module according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

4 is a block diagram of a mobile terminal according to an embodiment of the present invention.

The mobile terminal 200 according to an embodiment of the present invention has a plurality of operation modes and includes a power amplification module 220 for amplifying the power intensity of an RF signal and an RF signal to the power amplification module 220 And a modem 210 for controlling an operation mode of the power amplification module 220.

The mobile terminal 200 further includes a power detector 230 for detecting the power level of the RF signal output from the power amplifier 220 and outputting a reference voltage Vcon, And a DCDC converter 240 for adjusting the reference voltage Vcon according to a gain corresponding to the mode and supplying the driving voltage Vout to the power amplification module 220. [

Referring to FIG. 4, the RF transmitter 211 receives a baseband signal wirelessly transmitted from a modem, converts the received baseband signal into an RF signal, and outputs the RF signal to the power amplifier module 220.

A filter 270 may further be disposed between the RF transmitter 211 and the power amplification module 220. The filter 270 may convert the RF signal output from the RF transmitter 211 into a power amplification module 220).

The power amplification module 220 amplifies the power of the RF signal output through the RF transmission unit 211 according to a mode selected from various amplification modes using the driving voltage Vout inputted from the DCDC converter 240 And outputs it to the antenna 201. The amplification mode corresponds to the above-described operation mode.

Specifically, the power amplification module 220 amplifies a high frequency signal and transmits the amplified high frequency signal to a duplexer (not shown), and the antenna 201 radiates a high frequency signal transmitted through the duplexer as an air channel.

The output (dBm) of the power amplification module 220 is input to the power detection unit 230 and the reference voltage Vcon corresponding to the output (dBm) of the power amplification module 220 is input to the power detection unit 230 And transmits it to the DCDC converter 240.

The reference voltage Vcon may be proportional to the output (dBm) of the power amplification module 220. The reference voltage Vcon may be stored in the power detector 230 as a table corresponding to each output of the power amplification module 220.

When the output (dBm) of the power amplification module 220 is input, the power detector 230 transmits the reference voltage Vcon corresponding to the output (dBm) to the DCDC converter 240.

The DCDC converter 240 adjusts the reference voltage Vcon according to the gain corresponding to the operation mode of the power amplification module to output the driving voltage Vout ).

The operation mode control unit 213 determines the operation mode of the power amplification module 220 by determining the intensity of the signal received from the RF receiver unit (not shown) and / or the output (dBm) range of the power amplification module, Mode to provide the power amplification module 220 and the DCDC converter 240 with a signal corresponding to the mode.

For example, a signal is received from the air through the antenna 201 to a duplexer (not shown), and the electric field strength is detected based on the received signal. The operation of the power amplification module 220 The mode can be determined.

The operation mode of the power amplification module 220 may include a high power mode, a middle power mode, and a low power mode, whereby the gain of the DCDC converter is controlled by a high gain, a middle gain, and a low gain . ≪ / RTI >

That is, in the high power mode, the gain of the DCDC converter 240 is determined as a high gain. In the middle power mode, the gain of the DCDC converter 240 is determined as the middle gain. In the low power mode, (240) may be determined as a low gain.

Meanwhile, the operation mode of the power amplification module 220 may be two or four or more, and in this case, the gain may be set to two or four or more by the number of the operation modes.

Also, the magnitude may increase from high gain to low gain, for example, when the high gain is about 2.5V / V, the middle gain may be about 2.8V / V, and the low gain may be about 3.1 V / V.

Here, the driving voltage Vout supplied to the power amplifying module 220 is determined by multiplying the reference voltage Vcon by the corresponding gain.

4, the DCDC converter 240 includes a memory unit storing a plurality of gains, a switching unit 241 for selecting a gain according to an operation mode of the power amplification module 220, And a driving voltage adjusting unit 242 for adjusting the driving voltage Vcon.

The operation mode information of the power amplification module 220 is input from the operation mode control unit 213 to the switch unit 241 and the output of the power amplification module 220 from the power detection unit 230 dBm) of the reference voltage Vcon.

Also, the switching unit 241 selects a gain according to the operation mode of the power amplification module 220, for example, selects a high gain when the mode is the high power mode.

The driving voltage adjustment unit 242 multiplies the selected gain by the input reference voltage Vcon to determine the driving voltage Vout of the power amplification module 220.

Reference numeral 243 denotes a switching unit, and the switching unit 243 functions to deliver the adjusted driving voltage Vout to the outside of the DCDC converter 240.

In addition, the DCDC converter 240 may further include a gain adjusting unit (not shown) for adjusting the magnitude of each gain by connecting resistors and the like.

Therefore, when the driving voltage Vout corresponding to the output of the power amplification module 220 needs to be changed in order to minimize the consumption current, the magnitude of each gain is adjusted through the gain adjustment unit and supplied to the power amplification module 220 The driving voltage Vout can be changed.

The modem 210 may include a driving signal generator 212 for on / off control of the power amplifying module 220 and the DCDC converter 240. When the power amplifying module 220 is operated Only the DCDC converter 240 is driven to reduce the consumption current of the battery due to the DCDC converter 240 being driven.

5 is a graph for explaining the relationship between the output of the power amplifying module 220 and the driving voltage according to an exemplary embodiment of the present invention.

As described above, Vcon represents a reference voltage output from the power detector 230, and Vout represents a drive voltage output from the DCDC converter 240. [

As described above, the driving voltage Vout is determined by multiplying the reference voltage Vcon by each gain according to the operation mode of the power amplifying module 220. [

H denotes a high power mode, M denotes a middle power mode, and L denotes a low power mode.

As the driving voltage Vout of the power amplifying module 220 is lower, the current unnecessary to the power amplifying module 220 is not supplied to the power amplifying module 220, so that the energy consumed by the heat is minimized, thereby maximizing the consumption current reduction effect of the battery .

5, the reason why the driving voltage Vout and the reference voltage Vcon are raised again in the operating mode of the power amplifying module 220, that is, in a period in which the gain changes, is that the characteristics of the multi-stage power amplifying module 220 High gain, middle gain, and low gain should each have a variable gain value of about 2.5 V / V, about 2.8 V / V, and about 3.1 / V, respectively, to satisfy this characteristic .

The driving voltage Vout may be a minimum voltage that satisfies the adjacent channel leakage ratio (ACLR) of the RF specification. In order to satisfy the minimum voltage, Vcon) and the gain of each gain depending on the operation mode are determined.

division Output (dBm) of power amplifier module The reference voltage (Vcon) The driving voltage Vout High gain
26.63 1.15 2.875 22.07 0.76 1.9 15.92 0.48 1.2 Middle gain
15.58 0.93 2.325 10.32 0.57 1.425 5.15 0.37 0.925 Low gain

5.15 0.64 1.6 0.22 0.42 1.05 -4.52 0.29 0.725

Table 1 shows the values of the reference voltage Vcon and the driving voltage Vout according to the output of the power amplifying module 220. The high gain, the middle gain, and the low gain are about 2.5 V / V, about 2.8 V / V, and a value of about 3.1 / V.

As described above, in order to minimize the consumption current of the battery, an appropriate driving voltage should be supplied according to the operation mode and the output of the power amplification module 220. However, the driving voltage may be a minimum voltage Or more.

The driving voltage Vout may be a minimum voltage for satisfying the adjacent channel leakage equipment of the RF specification. Therefore, in order to satisfy such a condition, the reference voltage Vcon ) And the value of each gain may be adjustable.

Referring to Table 1, the power detector 230 may be provided with a reference voltage Vcon corresponding to the output (dBm) of the power amplifier module 220, And the reference voltage Vcon may be proportional to the output (dBm) of the power amplifying module 220. The reference voltage Vcon may be set to have a continuous value without changing abruptly according to the output (dBm)

The driving voltage Vout is lowered in accordance with the output dBm of the power amplifying module 220 by adjusting the driving voltage of the power amplifying module 220 through the DCDC converter 240 so that the power amplifying module 220 By preventing current from being supplied, the energy consumed by the heat can be minimized, thereby maximizing the effect of reducing the consumption current of the battery.

6 is a graph for explaining the relationship between the output of the power amplification module 220 and the consumed current according to an embodiment of the present invention.

G1 is a graph showing the consumption current of the power amplifying module constituting the mobile terminal according to the present invention, and G2 is a graph showing the consumption current of the power amplifying module constituting the conventional mobile terminal.

Referring to FIG. 6, G2 represents the consumed current when only the power amplification module is used without regulating the driving voltage. In the three sections in which the consumed current is abruptly changed, the gain of the multi-stage power amplification module is high gain, And low gain.

G1 indicates a case where the driving voltage is adjusted according to the operation mode of the power amplification module, and it can be confirmed that the consumption current is continuously reduced without a period of time that is abruptly changed as compared with G2.

That is, as described above, the mobile terminal according to an embodiment of the present invention continuously outputs the reference voltage Vcon according to the output (dBm) of the power amplification module 220 through the power detection unit 230, By adjusting the reference voltage Vcon to the gain according to the operation mode of the power amplification module 220, the consumed current can be continuously reduced without a section that changes abruptly.

As described above, the mobile terminal according to at least one embodiment of the present invention configured as described above can minimize the consumption current of the power amplification module by adjusting the driving voltage of the power amplification module according to the reception intensity.

Also, a mobile terminal according to at least one embodiment of the present invention may reduce heat generation during a call and increase the duration of the battery.

Hereinafter, a method of controlling the driving voltage of the power amplification module of the mobile terminal will be described in detail.

A method of controlling a driving voltage of a power amplifying module according to an embodiment of the present invention includes: (a) detecting a power intensity of an RF signal output from a power amplifying module and outputting a reference voltage; (B) determining an operation mode of the power amplification module; Adjusting the reference voltage to a gain according to the operation mode to output a driving voltage; And (d) transmitting the driving voltage to a power amplification module.

As described above, the operating mode of the power amplifying module includes a high power mode, a middle power mode, and a low power mode, and the gain may include high gain, middle gain, and low gain corresponding to each power mode , The size increases from the high gain to the low gain.

In addition, the step (a) may be performed through the power detector, the step (b) may be performed through the operation mode control unit of the modem, and the step (c) may be performed through the DCDC converter.

The step of outputting the driving voltage may include: selecting a gain according to the operation mode; And adjusting the reference voltage to a selected gain.

Also, the reference voltage may be proportional to the output of the power amplifier module, and the driving voltage may be a minimum voltage for satisfying the adjacent channel leakage equipment.

As described above, in order to minimize the consumption current of the battery, an appropriate driving voltage should be supplied according to the operation mode and the output of the power amplification module. However, the driving voltage should be at least the minimum voltage satisfying the RF specification .

The driving voltage may be a minimum voltage required for driving the power amplification module to satisfy the adjacent channel leakage equipment of the RF specification. Therefore, in order to satisfy such conditions, The magnitude of the reference voltage and the value of each gain may be adjustable.

As described above, the power detector 230 may be provided with a reference voltage Vcon corresponding to the output (dBm) of the power amplifier module 220, and the reference voltage Vcon may be provided to the power amplifier module 220 And the reference voltage Vcon may be proportional to the output (dBm) of the power amplification module 220. The reference voltage Vcon may be set to have a continuous value without changing abruptly according to the output (dBm)

DCDC converter to adjust the driving voltage supplied to the power amplifying module to lower the driving voltage Vout supplied to the power amplifying module according to the output (dBm) of the power amplifying module, , The energy consumed by the heat can be minimized, thereby maximizing the effect of reducing the consumption current of the battery.

The driving voltage control method of the mobile terminal and the power amplification module described above can be applied to a configuration and a method of the embodiments described above in a limited manner, Or some of them may be selectively combined.

100, 200: mobile terminal 201: antenna
210: modem 211: RF transmitter
212: drive signal generator 213: operation mode controller
220: power amplification module 230: power detection unit
240: DCDC converter 270: filter

Claims (15)

A power amplification module having a plurality of operation modes and amplifying the power intensity of the RF signal;
A modem for transmitting an RF signal to the power amplification module and controlling an operation mode of the power amplification module;
A power detector for detecting a power intensity of an RF signal output from the power amplifier module and outputting a reference voltage; And
And a DCDC converter for adjusting the power detection value according to a gain corresponding to an operation mode of the power amplification module to supply a driving voltage to the power amplification module,
Wherein the modem includes an operation mode control unit for determining the plurality of operation modes according to output ranges of the power amplification module,
Wherein the output ranges of the power amplification module correspond to the plurality of operation modes, respectively, divided according to intensity at which the consumption current is abruptly changed,
Wherein the magnitude of the gain of the operation mode corresponding to a small range of the output of the power amplification module is larger than the gain of the operation mode corresponding to a large range of the output of the power amplification module. The method according to claim 1,
Wherein the operating mode of the power amplification module includes a high power mode, a middle power mode, and a low power mode,
Wherein the gain corresponding to each of the plurality of operation modes includes a high gain corresponding to the high power mode, a middle gain corresponding to the middle power mode, and a low gain corresponding to the low power mode. 3. The method of claim 2,
Wherein a gain corresponding to each of the plurality of operation modes is increased from the high gain to the low gain. The DC-DC converter according to claim 1,
A memory unit storing a plurality of gains;
A switching unit for selecting one of the plurality of gains stored in accordance with a specific operation mode among the plurality of operation modes; And
And a drive voltage adjuster for adjusting the reference voltage using the selected gain. 5. The DC-DC converter according to claim 4,
And a gain adjuster for adjusting a magnitude of each of the stored plurality of gains. The method according to claim 1,
Wherein the power detection unit outputs any one of a plurality of reference voltages,
Wherein each of the plurality of reference voltages corresponds to an output of the power amplification module. The method according to claim 6,
Wherein the plurality of reference voltages are proportional to the output of the power amplifier module. The method according to claim 1,
Wherein the driving voltage is a minimum voltage satisfying an adjacent channel leakage equipment. Claim 9 has been abandoned due to the setting registration fee. Detecting a power intensity of the RF signal output from a power amplification module having a plurality of operation modes for amplifying power intensity of an RF signal and outputting a reference voltage;
Determining an operation mode of the power amplification module;
Adjusting a reference voltage according to the determined operation mode to output a driving voltage; And
And transmitting the driving voltage to a power amplification module,
Wherein the determining step determines the plurality of operation modes according to the output ranges of the power amplification module,
The operation mode of the power amplification module is divided according to the intensity at which the consumed current is abruptly changed,
Wherein a gain of the operation mode in which the output of the power amplification module corresponds to a small range is greater than a gain of the operation mode in which the output of the power amplification module is in a large range, Control method. delete delete delete delete delete delete

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